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bmwhype2
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How many roots does this equation have? 1. A does not equal 28 Oct 2007, 18:49
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How many roots does this equation have?

1. A does not equal 0
2. B does not equal 0



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How many roots does this equation have? 1. A does not equal 28 Oct 2007, 19:13
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Question stem not clear. Is it the official question?
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bmwhype2
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How many roots does this equation have? 1. A does not equal 28 Oct 2007, 19:18
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bmwhype2
How many roots does this equation have?

1. A does not equal 0
2. B does not equal 0
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Sorry. The equation is Ax + A = B
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How many roots does this equation have? 1. A does not equal 28 Oct 2007, 19:36
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Answer is A;

What is OA?
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beckee529
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How many roots does this equation have? 1. A does not equal 28 Oct 2007, 19:43
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bmwhype2
bmwhype2
How many roots does this equation have?

1. A does not equal 0
2. B does not equal 0

Sorry. The equation is Ax + A = B
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if A = 0 then no roots. if A is a non-zero, then it will have one root

1. A(x + 1) = B or A(x + (1 - B)) will have one root
sufficient

2. since B is a constant, it is irrelevant. We need to know about A only,
insufficient
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How many roots does this equation have? 1. A does not equal 28 Oct 2007, 21:41
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bmwhype2
bmwhype2
How many roots does this equation have?

1. A does not equal 0
2. B does not equal 0

Sorry. The equation is Ax + A = B
Show more



I don't know if this is right but heres what I did:

Ax+A=B---> Ax+A-B=0. This is def. a quadratic so I just changed it to look more appealing to the eyes.

x^2+x-2=0. From this we can see that we are going to have two roots UNLESS x=0. So S1 is suff.

s2: x^2+x-0=0---> x^2=-x. We could have two roots, but b/c we don't know whether x=0 we can't say it has two roots. Insuff.


my say is A.



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